Draft eliminator for windows



mm@ 23, m36. Tw. NEUMUTH www DRAFT ELIMINATOR FO WINDOWS Filed July 17, 1935 Patented `lune 23, 1936 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to an arrangement for eliminating draft through the joints of window sashes, especially sliding window sashes, at the point where the top sash rail ends meet the sash casing. When a sliding window sash is closed and the sash lock tightened so that the top rail of the lower sash locks against the bottom rail of the upper sash, a considerable air passage is possible around the ends of the top rail of the lower sash, because in order to slide freely in the sash frame, the sash must of necessity have an appreciable amount of play. It is due to the gaps occasioned by this play that a considerable amount of air passes. To stop this draft at this point of the sash is the particular object of my invention by means of a block or cover which is attached to each end of the top rail of the lower sash and placed between the sash cord and the sash frame, and transversely extends across the entire slide way of the lower sash.

My invention is illustrated in the accompanying drawing in which- Fig. 1 represents in perspective the left-hand upper corner of the lower sash of a sliding sash window,

Fig. 2 represents in plan view the two sashes,

Fig. 3 represents in perspective a modified form of the draft eliminator.

Referring to Figs. 1 and 2, I is the top rail of the lower sash which latter slides in the sash frame I6 between the inner guide strip 4 and the parting strip 5. The upper sash 2 slides between the parting strip- 5 and the outer guide strip I I. Since the upper sash 2 is pressed against the outside slide II when the sashes are locked against one another in the customary manner, the gap which still exists between the ends of the top rail 2 and the sash frame I6 is closed by this tight t against strip II so that no further means need b-e provided for the upper sash. This is different, however, in case of the lower sash where the gaps I0 indicated by dotted lead lines in Fig. 2 open Idirectly from the outside air at one end to the top of the top sash rail. In order to close this gap on the inside of the window I provide a cover or block E which fits between strips 4 and 5, and fills the space between the sash cord and the sash frame I6, and which by means of a recess I permits the sash cord 3 to freely slide through the cover. This cover extends a small distance out from the strips where it is attached by means of screws 8 to the top rail I of the lower sash. The cover 6 can be easily inserted between the guide and parting strips by pulling out the sash cord from between the strips and slipping the cord into the notch 'I of the cover and then allowing the cover to drop (ci. .cw-52.4)

down in place at each end of the sash rail, when the screws 8 can be driven home. From Figs. 1 and 2 it will be noted that the portion of cover 6 which extends outward from between the twostrips 4 and 5 extends also at one end 9 across the parting strip 5, thereby covering the gap which is left between the end of the top rail and the outer surface of strip 5.

In order to avoid the necessity of providing two styles of cover 6, one in which the extension 9 is provided at the right-hand side of the cover such as is shown at the left in Fig. 2, and another in which the extension 9 is provided at the left side of the cover,rsuch as is shown at the right-hand side of Fig. 2, I may provide a style of cover which answers both purposes such as is shown in Fig. 3 in which the cover is provided with two lateral extensions 9, one on each side.

The cover shown in Figs. 1, 2 and 3 may be made of any suitable solid, hard material, such as hard wood, hard bre, or white rubber.

It will be noted from Figs. 1 and 3 that the cover is comparatively thick, and that the portion of the cover which is located between the two guides 4 and 5 of the sash is also provided, aside from notch l with a notch I8 of suicient size to accommodate the sash cord. This notch I8 comes into action when the sash is raised to near the top and accommodates the sash co-rd.

Besides the considerably higher portion of the cover to which the lead line of numeral 6 in Fig. 3 points, and which is located between the two sash guides 4 and 5, extends closely to the guides and to the sash frame I6 and thereby affords better w-ear of the cover, because of its larger bearing surface, since this draft eliminator, in order to properly function must remain always in fairly close contact with the sash frame and the sash guides. This feature combines with it the advantage of keeping the sash from rattling between the guides, a combination which is not inherent to similar devices of the prior art so far as I am aware.

I claim:

A draft eliminator for sliding window sashes, consisting of a cover of suitable material, attached to each end of the top sash rail adjacent to the sash cord and the sash casing, said cover surrounding the cord at least half way and extending between the lateral sash guides and the parting strip and across the parting strip to cover the gaps between the ends of the top sash rail and the sash casing and the guides, said cover having upwardly extending lugs closely adjacent to the sash guide strip and the parting strip, and the sash frame.

THEODORE W. NEUMUTH. 

